溶胶-凝胶法增强Sr2+掺杂CaMnO3的微波吸收性能

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.519

Kaiheng Chang , Fengjiao Qian , Zhuqing Sun , Yuzhou Gu , Chuyang Liu , Hao Yang

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引用次数: 0

摘要

CaMnO3由于其显著的热电特性而引起了人们的广泛关注。CaMnO3的高温稳定性和介电特性也凸显了其作为微波吸收材料的潜力。在这项研究中，我们报道了两种不同方法制备的CaMnO3的微波吸收性能，即固态反应和溶胶-凝胶法。研究了制备方法对CaMnO3形貌和物理性能的影响。结果表明，溶胶-凝胶法制备的样品具有更强的反射损失和更宽的吸收带宽。采用溶胶-凝胶法研究了Sr2+掺杂对CaMnO3吸附性能的影响。在Sr2+掺杂浓度为5%时，CaMnO3的反射损失值为- 45.96 dB，有效吸收带宽为5.04 GHz (8.5-13.5 GHz)，覆盖了整个x波段（8-12 GHz）。我们的研究结果将CaMnO3的应用频率窗口从文献报道的高频ku波段大大扩展到较低的x波段，证明了CaMnO3是一种出色的x波段吸收剂。

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Enhancement of microwave absorption properties of Sr2+-doped CaMnO3 synthesized by Sol-Gel

CaMnO₃ has garnered significant attention due to its remarkable thermoelectric properties. The high-temperature stability and dielectric characteristics of CaMnO₃ could also underscore its potential as a microwave absorbing material. In this study, we reported the microwave absorption properties of CaMnO₃ prepared by two different methods, solid-state reaction and sol-gel methods. The influence of the preparation method on the morphology and physical properties of CaMnO₃ was studied. The results showed that the samples prepared by sol-gel method display much stronger reflection loss and wider absorption bandwidth. Based on the sol-gel method, the effect of Sr²⁺-doping on the absorption properties of CaMnO₃ was also investigated. At Sr²⁺ doping concentration of 5 %, CaMnO₃ displays remarkable reflection loss value of −45.96 dB accompanied with a broad effective absorption bandwidth of 5.04 GHz (8.5–13.5 GHz) covering the full X-wave band (8–12 GHz). Our results greatly extend the application frequency window of CaMnO₃ from the high frequency Ku-wave band reported in the literature to the lower X-wave band, demonstrating CaMnO₃ as an outstanding X-wave band absorber.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.